Cu(II) removal from aqueous solution by Spartina alterniflora derived biochar

Li, Mi; Liu, Qiang; Guo, Lihui; Zhang, Yaping; Lou, Zhenjun; Wang, Yang; Qian, Guangren

doi:10.1016/j.biortech.2012.12.096

Cited by 197 publications

(65 citation statements)

References 34 publications

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“…This evolution is somewhat similar to that reported in the literature [15]. The increase in the surface area and pore volumes might be caused by the progressive degradation of the organic materials (hemicelluloses, cellulose and lignin) and the formation of vascular bundles or channel structures during pyrolysis during the process [46,47]. Hemicellulose has a high reactivity during thermal treatment at lower temperature (usually under 300 • C).…”

Section: Surface Area and Pore Volumesupporting

confidence: 84%

Effect of Temperature on the Structural and Physicochemical Properties of Biochar with Apple Tree Branches as Feedstock Material

2017

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Abstract:The objective of this study was to study the structure and physicochemical properties of biochar derived from apple tree branches (ATBs), whose valorization is crucial for the sustainable development of the apple industry. ATBs were collected from apple orchards located on the Weibei upland of the Loess Plateau and pyrolyzed at 300, 400, 500 and 600 • C (BC300, BC400, BC500 and BC600), respectively. Different analytical techniques were used for the characterization of the different biochars. In particular, proximate and element analyses were performed. Furthermore, the morphological, and textural properties were investigated using scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, Boehm titration and nitrogen manometry. In addition, the thermal stability of biochars was also studied by thermogravimetric analysis. The results indicated that the increasing temperature increased the content of fixed carbon (C), the C content and inorganic minerals (K, P, Fe, Zn, Ca, Mg), while the yield, the content of volatile matter (VM), O and H, cation exchange capacity, and the ratios of O/C and H/C decreased. Comparison between the different samples show that highest pH and ash content were observed in BC500. The number of acidic functional groups decreased as a function of pyrolysis temperature, especially for the carboxylic functional groups. In contrast, a reverse trend was found for the basic functional groups. At a higher temperature, the brunauer-emmett-teller (BET) surface area and pore volume are higher mostly due to the increase of the micropore surface area and micropore volume. In addition, the thermal stability of biochars also increased with the increasing temperature. Hence, pyrolysis temperature has a strong effect on biochar properties, and therefore biochars can be produced by changing pyrolysis temperature in order to better meet their applications.

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Section: Surface Area and Pore Volumesupporting

confidence: 84%

Effect of Temperature on the Structural and Physicochemical Properties of Biochar with Apple Tree Branches as Feedstock Material

2017

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“…doi: 10.17221/274/2014-SWR biomass feedstocks such as crop and forest residues (Lehmann 2007;Li et al 2013), animal manure (Cao et al 2009;Cao & Harris 2010;Ro et al 2010), sewage sludge Méndez et al 2012), is a carbon-rich material with reactive surfaces. Currently, it has attracted much attention due to its wide applications in environmental management (Kumar 2010).…”

mentioning

confidence: 99%

Effectiveness of sunflower seed husk biochar for removing copper ions from wastewater: a comparative study

Saleh¹,

Elrefaey²,

Mahmoud³

2016

Soil Water Res.

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Saleh M.E., El-Refaey A.A., Mahmoud A.H. (2016): Effectiveness of sunflower seed husk biochar for removing copper ions from wastewater: a comparative study. Soil & Water Res., 11: 53-63.Copper represents one of major hazardous pollutants in wastewater. The aim of this study is the comparison between sunflower seed husk biochar (SSHB) and activated carbon (AC) and sunflower seed husk feedstock (SSHF) in their efficiency of Cu 2+ removing from aqueous solutions. The removed Cu 2+ was monitored for various intervals extended to 96 h at 298, 303, and 308 K in batch experiments. Adsorption reactions showed that SSHB was superior in Cu 2+ removal process at all tested temperatures in comparison with AC and SSHF. Results of surface properties and Fourier transform infrared spectroscopy confirmed the higher surface reactivity of SSHB than AC and SSHF. Both SSHF and AC were affected by time and temperature of reaction in their removal efficiency for Cu 2+ while SSHB was not affected by these parameters. A deformation observable under a scanning electron microscope and a higher release of dissolved organic carbon from SSHF after the reaction with Cu 2+ and vice versa in SSHB suggested the electrostatic ion exchange and complex reactions mechanisms for Cu 2+ removal by SSHF in addition to the physical sorption controlled by surface area and porosity of SSHB. The adsorption kinetics of Cu 2+ was fitted to pseudo second order equation and obtained results indicate that SSHB is a recalcitrant and a strong biosorbent. Therefore, SSHB can be introduced as a cost-effective and efficient biosorbent for copper removal from wastewaters.

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“…Charred biomasses, on the other hand, are estimated to have mean residence times of thousands of years in soils (Lehmann et al 2008). Many studies have investigated the adsorption of Pb, Cr, and Cu on biochar in single sorbate systems (Liu and Zhang 2009;Mohan et al 2011;Tong et al 2011;Lu et al 2012;Shen et al 2012;Li et al 2013). However, as metals usually coexist in the environment and undergo competitive sorption (Zhu et al 2010;Chen et al 2011), the study of systems with a mixture of contaminants is paramount.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption appears to be a good choice if a low-cost adsorbent is applied (Shi et al 2009). Biomass-derived biochar is considered as a promising heavy metal adsorbent (Mohan et al 2007;Qiu et al 2008;Liu and Zhang 2009;Beesley and Marmiroli 2011;Li et al 2013), due to abundance of polar functional groups, such as carboxylic, hydroxyl, and amino groups, which are available for heavy metal removal (Cao et al 2009;Hsu et al 2009;Wang et al 2010). Biochar is a fine-grained carbonaceous solid residue, produced by pyrolysis of carbon-rich biomass under oxygen-limited conditions (Chen et al 2011;Xu et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of pruning-derived biochar on heavy metals removal and water dynamics

et al. 2014

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Biomass-derived biochar is considered as a promising heavy metal adsorbent, due to abundance of polar functional groups, such as carboxylic, hydroxyl, and amino groups, which are available for heavy metal removal. The aims of this study were to evaluate the effectiveness of an orchard pruning-derived biochar in removing some heavy metals (through the evaluation of isotherms) and to study water dynamics at the solid-liquid interface as affected by heavy metal adsorption (through an innovative nuclear magnetic resonance (NMR) relaxometry approach). Both isotherms and NMR spectra revealed that Pb and Cr showed a good affinity for the biochar surface (Pb > Cr), while Cu was less affine. Accordingly, higher amounts of Pb and Cr were adsorbed by biochar as compared to those of Cu in the single systems. In binary systems (i.e., when two metals were applied simultaneously), Pb showed the highest inhibition of the adsorption of the other two metals, whereas the opposite was evidenced when Cu was used; the competitive adsorption was also strongly influenced by the metal residence time on biochar surface. In ternary systems (i.e., when all metals were applied simultaneously), even in the presence of high amounts of Pb and Cr, considerable adsorption of Cu occurred, indicating that some biochar adsorption sites were highly specific for a single metal.

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Cu(II) removal from aqueous solution by Spartina alterniflora derived biochar

Cited by 197 publications

References 34 publications

Effect of Temperature on the Structural and Physicochemical Properties of Biochar with Apple Tree Branches as Feedstock Material

Effect of Temperature on the Structural and Physicochemical Properties of Biochar with Apple Tree Branches as Feedstock Material

Effectiveness of sunflower seed husk biochar for removing copper ions from wastewater: a comparative study

Effect of pruning-derived biochar on heavy metals removal and water dynamics

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